Microsoft 365 apps say farewell to Internet Explorer 11 and Windows 10 sunsets Microsoft Edge Legacy

Microsoft365_MicrosoftEdge_Product 

"We recommend that rather than use the Open with Explorer command, a better option is to sync your SharePoint files or move or copy files in SharePoint."

Many users who choose Open with Explorer option instead of sync, because they only need to see the file/folder occasionally.  Furthermore, we have had other problems with users using the sync option.  They sync a full library with too many files, or something strange happed and they ended up duplicated tons of files back up to SharePoint causing more headache.  

With Windows 10, we have been able to let user copy and paste the library path directly to Windows Explorer.  However, the authentication times out and will not let users view the files.  This becomes another unreliable method.

All in all, IE 11 is the only consistent way where a site user can access file via Windows Explorer.  This is my only reason for keeping IE 11.